Process for ion exchange on glass or glass ceramic

Details Process for ion exchange on glass or glass ceramic Process for ion exchange on glass or glass ceramic

1991-07-01

1992-07-07

Lindsay, Robert L.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 3014, 250292, C03C 2100

Patent

active

051279312

ABSTRACT:
For ion exchange at the surface of glass or glass ceramic, the ion exchange is carried out by means of a solid layer containing mainly one or more salts which do not melt at the exchange temperature and contain mono- or divalent cations. The layer can be applied to the glass as a dispersion in water or as an organic dispersion medium. Preferably, its thickness is 0.02 to 2 mm and the salts have a particle size of less than 60 .mu.m. Despite the solid reaction, the ion exchange proceeds at a surprisingly rapid rate and leads to products having highly reproducible properties. Corrosive attack of the glass surface does not take place.

REFERENCES:
patent: 1592429 (1926-07-01), Kraus
patent: 2919209 (1959-12-01), Bossard
patent: 3420698 (1969-01-01), Smith
patent: 3468745 (1969-09-01), Navez et al.
patent: 3524737 (1970-08-01), Doyle et al.
patent: 3607172 (1971-09-01), Poole
patent: 3615323 (1971-10-01), Cornelissen et al.
patent: 3791809 (1974-02-01), Lau
patent: 4397667 (1983-08-01), Morimoto et al.
Glastechn, Ber. 50 (1977) Nr. 4, S. 63-67.

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